#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
int gval = 100;
int main()
{
	pid_t id = fork();
	if (id == 0)
	{
		while(1)
		{
			printf("子进程: gval: %d,&gval：%p,pid: %d, ppid: %d\n",gval,&gval,getpid(),getppid());
			sleep(1);
			gval++;
		}
	}
	else
	{
		while(1)
		{
			printf("父进程: gval: %d,&gval：%p,pid: %d, ppid: %d\n",gval,&gval,getpid(),getppid());
			sleep(1);
		}
	}
	return 0;
}

//int g_unval;
//int g_val = 100;
//
//int main(int argc, char *argv[], char *env[])
//{
//    const char *str = "helloworld";
//    printf("code addr: %p\n", main);
//    printf("init global addr: %p\n", &g_val);
//    printf("uninit global addr: %p\n", &g_unval);
//
//    static int test = 10;
//    char *heap_mem = (char*)malloc(10);
//    char *heap_mem1 = (char*)malloc(10);
//    char *heap_mem2 = (char*)malloc(10);
//    char *heap_mem3 = (char*)malloc(10);
//    printf("heap addr: %p\n", heap_mem); //heap_mem(0), &heap_mem(1)
//    printf("heap addr: %p\n", heap_mem1); //heap_mem(0), &heap_mem(1)
//    printf("heap addr: %p\n", heap_mem2); //heap_mem(0), &heap_mem(1)
//    printf("heap addr: %p\n", heap_mem3); //heap_mem(0), &heap_mem(1)
//
//    printf("test static addr: %p\n", &test); //heap_mem(0), &heap_mem(1)
//    printf("stack addr: %p\n", &heap_mem); //heap_mem(0), &heap_mem(1)
//    printf("stack addr: %p\n", &heap_mem1); //heap_mem(0), &heap_mem(1)
//    printf("stack addr: %p\n", &heap_mem2); //heap_mem(0), &heap_mem(1)
//    printf("stack addr: %p\n", &heap_mem3); //heap_mem(0), &heap_mem(1)
//
//    printf("read only string addr: %p\n", str);
//   for(int i = 0 ;i < argc; i++)
//    {
//        printf("argv[%d]: %p\n", i, argv[i]);
//    }
//   for(int i = 0; env[i]; i++)
//    {
//        printf("env[%d]: %p\n", i, env[i]);
//    }
//
//    return 0;
//}
